As to the thermal extension coefficient, basalt fiber is very close to concrete than other conventional reinforcements – steel or AR-glass. According to its parameters, basalt fiber is the most compatible one among concrete reinforcement materials. The detailed data are as follow:
Steel: 13 m/mK x 10-6
AR-glass: 2 m/mK x 10-6
Basalt fiber: 8 m/mK x 10- 6
Concrete: 10 m/mK x 10-6
Concrete density is very close to the one of basalt fiber. Compared to organic or carbon fibers, basalt fiber has advantages especially in application of concrete seamless floors, where are, generally, used to protect the concrete surface from cracks with various type of chopped fibers.
We should pay more attention to the fiber dispersion in the matrix that chopped basalt fiber shall be dispersed uniformly because of their almost the same density with concrete while the organic fibers shall concentrate on the surface of the concrete for their low density. These are the data sheet for reference.
Concrete – 2.2 -2.5 g/cm3
Basalt – 2.5 -2.8 g/cm3
AR-glass – 2.5 -2.6 g/cm3
Carbon – 1.6 -2.1 g/cm3